I think one could make a good case for having any reasonably competent backpacker become knowledgeable with the basics of technical climbing - familiarity with belaying, knots and anchors, and how to rappel safely. I am not saying that you have to climb 5.15 to be safe, but proper use of a rope can increase the safety margin on a lot of trips. Part of what you should learn is what terrain to avoid if you are not equipped properly.